package com.shopping.service.Impl;

import com.shopping.common.Const;
import com.shopping.common.ServerResponse;
import com.shopping.common.TokenCache;
import com.shopping.dao.UserMapper;
import com.shopping.pojo.User;
import com.shopping.service.IUserService;
import com.shopping.util.MD5Util;


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.UUID;

@Service("iUserService")
public class UserServiceImpl implements IUserService{

    @Autowired
    private UserMapper userMapper;
    @Override
    public ServerResponse<User> login(String username, String password){
        //登陆检查用户名是否存在
        int resultCount =userMapper.checkUsername(username);
        if (resultCount==0){
            return ServerResponse.createByErrorMessage("用户名不存在");
        }
        //密码登陆MD5加密

        String md5Password=MD5Util.MD5EncodeUtf8(password);

        User user =userMapper.selectLogin(username,md5Password);

        if (user==null){

            return ServerResponse.createByErrorMessage("密码错误");
        }

        user.setPassword(org.apache.commons.lang3.StringUtils.EMPTY);//密码制成一个空

        return ServerResponse.createBySuccess("登陆成功！",user);


    }
    @Override
    public ServerResponse<String> register(User user){
        ServerResponse validResponse=this.checkValid(user.getUsername(),Const.USERNAME);
             if (!validResponse.isSuccess()){
                 return  validResponse;
             }
            validResponse=this.checkValid(user.getEmail(),Const.EMAIL);

            if (!validResponse.isSuccess()){
                return  validResponse;
            }

        user.setRole(Const.Role.ROLE_CUSTOMER);

        //MD5加密 非对称加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));

       int resultCount=userMapper.insert(user);

        if (resultCount==0){
            return  ServerResponse.createByErrorMessage("注册失败");
        }
        return ServerResponse.createBySuccessMessage("注册成功");
    }
    @Override
    public ServerResponse<String> checkValid(String str,String type){

        if (org.apache.commons.lang3.StringUtils.isNotBlank(type)){
            //开始校验
            if (Const.USERNAME.equals(type)){
                int resultCount=userMapper.checkUsername(str);
                if (resultCount>0){
                return ServerResponse.createByErrorMessage("用户已存在");
                }
            }
            if(Const.EMAIL.equals(type)){

                int resultCount=userMapper.checkEmail(str);
                if (resultCount>0){
                    return ServerResponse.createByErrorMessage("邮箱已经存在");
                }

            }
        }else {
            return  ServerResponse.createByErrorMessage("校验错误");
        }
        return ServerResponse.createBySuccessMessage("校验成功！");
    }
    @Override
    public ServerResponse selectQuestion(String username){
        ServerResponse validResponse=this.checkValid(username,Const.USERNAME);
        if (validResponse.isSuccess()){
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question=userMapper.selectQuestionByUsername(username);
        if(org.apache.commons.lang3.StringUtils.isNotBlank(question)){
            return ServerResponse.createBySuccess(question);
        }
            return ServerResponse.createByErrorMessage("找回密码的问题是空的");

    }
    @Override
    public ServerResponse<String> checkAnswer(String username,String question,String answer){
    int resultCount=userMapper.checkAnswer(username,question,answer);
        if (resultCount>0){
            //说明问题及其问题答案是这个用户的,并且是正确
            String forgetToken= UUID.randomUUID().toString();
            TokenCache.setKey(TokenCache.TOKEN_PREFIX+username,forgetToken);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误");
    }
    @Override
    public ServerResponse<String> forgetResetPassword(String username,String passwordNew,String forgetToken){
        if (org.apache.commons.lang3.StringUtils.isBlank(forgetToken)){
            return ServerResponse.createByErrorMessage("参数错误，token需要传递");
        }
       ServerResponse validResponse=this.checkValid(username,Const.USERNAME);
        if (validResponse.isSuccess()){
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String token=TokenCache.getKey(TokenCache.TOKEN_PREFIX+username);

        if(org.apache.commons.lang3.StringUtils.isBlank(token)){
            return ServerResponse.createByErrorMessage("token无效或者过期");
        }
        if(org.apache.commons.lang3.StringUtils.equals(forgetToken,token)){
            String md5Password  = MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount = userMapper.updatePasswordByUsername(username,md5Password);

            if(rowCount > 0){
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        }else{
            return ServerResponse.createByErrorMessage("token错误,请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
        }

    @Override
    public ServerResponse<String> resetPassword(String passwordOld,String passwordNew,User user){
        //防止横向越权，要效验这个用户的旧密码，一定要指定这个用户,因为会查询一个count（1）,如果不指定id，那么结果就是true啦count>0
        String str=MD5Util.MD5EncodeUtf8(passwordOld);
        int resultCount=userMapper.checkPassword(str,user.getId());
        if (resultCount==0){
            return ServerResponse.createByErrorMessage("旧密码错误！");
        }
        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount=userMapper.updateByPrimaryKeySelective(user);
        if (updateCount>0){
            return ServerResponse.createBySuccessMessage("密码更新成功！");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");
    }
    @Override
    public ServerResponse<User> updateInfotmation(User user){
        //更新时，username不能更新
        //email也要进行校验，校验新的email是不是已经存在，并且存在的email如果相同的话，不能是我们当前的这个用户

        int resultCount=userMapper.checkEmailByUserId(user.getEmail(),user.getId());
        if (resultCount>0){
            return ServerResponse.createByErrorMessage("email已存在，请更换email再尝试更新");
        }
        User  updateUser=new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());
        updateUser.setUsername(user.getUsername());
        //是否更新成功
        int updateCount=userMapper.updateByPrimaryKeySelective(updateUser);
        if (updateCount>0){
            return ServerResponse.createBySuccess("更新个人信息成功!",updateUser);
        }
            return ServerResponse.createByErrorMessage("更新个人信息失败!");
    }
    @Override
    public  ServerResponse<User> getInformation(Integer userId){
        User user=userMapper.selectByPrimaryKey(userId);
        if (user==null){
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword((org.apache.commons.lang3.StringUtils.EMPTY));
        return ServerResponse.createBySuccess(user);
    }
    //验证是否是超级管理员
    public ServerResponse checkAdminRole(User user){
        if (user!=null && user.getRole().intValue()==Const.Role.ROLE_ADMIN){
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }
}